Polypropylene PP and its Variants

PP-R has lower strength, but greater flexibility, whilst retaining good high temperature capability. The material is used for smaller diameter flexible tubing in hot water internal piping. Here it competes as a lower cost alternative to PE-X and polybutylene. 

PP-B retains good stiffness, has lower strength than PP-H, but is tougher at 0 C and below. The copolymer block structure essentially creates a heterophase microstructure 

A further advantage of PP is good abrasion resistance and therefore PP products are suitable for slurry pipe applications. 

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